Tennis Warehouse Playtest - Babolat RPM Power 1.25

TW Staff

Administrator
Attention Talk Tennis Members:

Babolat RPM Power 1.25mm co-poly playtest. This playtest is for USA TTW members only.

The application period is closed.

Selected playtesters have been notified.

REVIEW IS DUE December 2

Include the following in your review:

Please install as full bed.
  • Tension(s) used for playtest
  • Regular string set up & tension
  • Racquet used for test
  • Power/Control of test string
  • Feel (Stiff? Mushy? Muted? Crisp? Comfortable?)
  • Spin
  • Durability
  • Playability Duration
  • Tension Recommendations (would you string it differently next time? Explain answer)
  • List any additional thoughts (optional)
We encourage a lively pre-game discussion on Babolat strings but we may remove "email sent" and "I hope I get selected" and "why didn't I get selected" posts BECAUSE we want to keep the thread informative.
 
Last edited:

ron schaap

Hall of Fame
Interesting how this plays. Regular rpm seems to die off, rpm rough is way more lively and soft. I wonder if rpm power will come in the neon yellow, as it matches the aero paintjob :love:
Sorry, i dont agree. Regular blast 1.30 is playable for a long time even after it has lost tension and profile. The rough version has a kind of feel similar to Wilson Revolve which i dont like, maybe too soft.
I would be interesting if the new Power version has even more power than the old regular version. Stan the man still plays with rpm blast i think.
 

jangotango

Semi-Pro
From the looks of it, this may be a competitor with the new Head Experimental string that won the tennis string test in a European tennis organization. Seems like the key to success may be brown-colored, shaped polys lol.

As long as this string is as easy to string as RPM Blast, super long-lasting slickness of the RPM family, playability of RPM Team, and performance of Thiem's backhand, I'll be praying everynight that I get selected. If not, perhaps I'll buy a set in the future!
 

MisterP

Hall of Fame
I've heard reviews already it plays exactly like Hurricane Tour...
Never tried Hurricane before, so if I get picked up for this playtest it will be a new experience for me either way. Hurricane has been around forever, surely this one will play softer than that.
 

Bender

G.O.A.T.
This playtest is for USA TTW members only.


Just kidding

Looking forward to see what the playtesters say! I'm using a RPM Rough + Blast hybrid at the moment; if this sits somewhere inbetween I wouldn't mind buying a reel just to mix things up once in a while.
 

Injured Again

Hall of Fame
Does anyone know what Babolat tried to accomplish with this string? RPM and RPM Rough seem to have the stiffer/softer spectrum covered to a good degree. Is it round rather than shaped/textured? Is it supposed to be softer like Rough but with better tension maintenance?
 

gutfeeling

Hall of Fame
Got selected too! Anyone know if this is the champagne colored string Thiem was playtesting earlier this year?


Sent from my iPhone using Tapatalk
 

McLovin

Legend
Oof. That sounds like you hit something other than water...
Lol. No, came up short on a toe front flip. Board hit the water & stopped, and I kept going, torquing my right knee. Actually ripped my left binding out of the board.

Luckily, of all the *CLs to tear, MCL is the “best” as normally no surgery is required.
 

Injured Again

Hall of Fame
Got selected too! Anyone know if this is the champagne colored string Thiem was playtesting earlier this year?
I poked around a bit and found out that apparently Thiem wanted a string to give him more power and control. According to Babolat, Thiem used this string in a tournament victory recently.

It's round, with a slick coating over a copoly base material. The coating is supposed to provide exceptional slickness and the interior material is more elastic, providing more power. The more control part is due to it being round, and creating a more consistent and lower launch angle than any of the RPM strings. Probably means it is less sensitive to incoming ball spin and also a with a bit less bite than a shaped string. Because very few if any of us have the racquet head speed that Thiem can generate, it will be interesting to see how this string works for recreational players.
 

Injured Again

Hall of Fame
Also wanted to say that it will be interesting to see how it works for recreational players who don't switch frames every seven or nine games, and will tend to play with the string after the coating wears through. I was a tester for the Dunlop Xplosive Speed and that string changed characteristics noticeably after it notched through the coating, at which point it still wasn't that close to breaking.
 

gutfeeling

Hall of Fame
Also wanted to say that it will be interesting to see how it works for recreational players who don't switch frames every seven or nine games, and will tend to play with the string after the coating wears through. I was a tester for the Dunlop Xplosive Speed and that string changed characteristics noticeably after it notched through the coating, at which point it still wasn't that close to breaking.
So far max power and 4G are the two smooth polys that have maintained their initial high playability the longest. That is the standard I will be measuring this string against.
 

deaner2211

Semi-Pro
Attention Talk Tennis Members:

Babolat RPM Power 1.25mm co-poly playtest. This playtest is for USA TTW members only.

The application period is closed.

Selected playtesters have been notified.

REVIEW IS DUE December 2

Include the following in your review:
  • Tension(s) used for playtest
  • Regular string set up & tension
  • Racquet used for test
  • Power/Control of test string
  • Feel (Stiff? Mushy? Muted? Crisp? Comfortable?)
  • Spin
  • Durability
  • Playability Duration
  • Tension Recommendations (would you string it differently next time? Explain answer)
  • List any additional thoughts (optional)
We encourage a lively pre-game discussion on Babolat strings but we may remove "email sent" and "I hope I get selected" and "why didn't I get selected" posts BECAUSE we want to keep the thread informative.
Can we use the string in a hybrid?
 
Just got my sample in the mail today. It is indeed a dark bronze color. Just by feeling it in my hand it is smooth and has no "rough" texture to it. It also kinks a bit, and feels stiff, but this is just me playing with it. Real review of actual hitting to come soon
 

haqq777

Legend
Luckily, of all the *CLs to tear, MCL is the “best” as normally no surgery is required.
Yikes. Best of luck with recovery. Seems like this is the favorite line of surgeons. Mine said best tear to have of all tears is a meniscal tear; easiest to go in and fix. CLs off course are a bigger issue. Had my surgery done last month. Back on court this week. Close to 90% recovery so far. Working on getting back to 100% with PT.
 

mhkeuns

Hall of Fame
Got mine yesterday. One of the best colors I’ve ever seen. It also has almost like a matte finish to it. It also attacked me when I opened the package and the coil memory is insane.
Same here. I was lucky to close the case before it got out. Nice color for sure.
 

djNEiGht

Hall of Fame
Got mine yesterday. One of the best colors I’ve ever seen. It also has almost like a matte finish to it. It also attacked me when I opened the package and the coil memory is insane.
Same here. I was lucky to close the case before it got out. Nice color for sure.

I usually open the BAbolot string package by taking the back sticker off and pulling string out through the opening with an awl. I wonder if that's the same type of packaging on this test string. Glad you guys stayed safe from the jack in the box attack *smirk*
 

JOSHL

Hall of Fame
Ok so just a heads up. I strung this today in my V7 Blade 18x20. I always do 2 piece and cut sets in half so 20’ and 20’. Usually I’ll need to bridge with a staring clamp to pull the last outer main strings. I’m not sure if this string is only 38-39’ but I had to bridge the last 2 outer mains and the string barely made it through to the last main hole. Almost couldn’t tie off. So be careful when stringing this up in a tight pattern for sure. Also pulling the crosses was a nightmare, the coil memory was aggressive to say the least. This was having the string sit outside the packaging for a day as well. It has a metallic feeling too when pulling the crosses through. Weird string man.
 

Injured Again

Hall of Fame
I strung this up tonight in my SW104. The string came in typical Babolat packaging.





Can't say at least a couple of you guys didn't warn me. I tried to carefully open the package but of course it sprung open on me, and practically **exploded**.



Sigh......

After numerous colorful words and impure thoughts, I got it untangled. I did a light prestretch to ease the significant coil memory. It was better after the prestretch and sitting out for about 30 minutes. My sample measured 39' 3". I only need about 36' to string my SW104 using one piece so I was good to go. Here's the finished string job:



I used the exact same tension as S7T that was in there just prior: 51 pounds in the center 8 mains decreasing to 39 pounds on the outer mains, and 46 pounds in the center five crosses decreasing to 32 pounds at the top and bottom cross. It weighed 2 grams more than with 17 gauge S7T.

The coating feels hard and does have a matte finish to it. Stringing the first few crosses makes the mains vibrate like fingernails on a chalkboard. Elasticity was just a little bit more than an average poly. I cut a one foot section and pulled 51 pounds and let it sit for a few minutes, then repulled tension. Tension loss was average to above average. Friction weaving the crosses was a greater than average and more than with S7T, as was friction pulling through the grommets. When I was straightening the strings after finishing, the strings take a moderate amount of effort to move, then kind of suddenly give way with a creaking kind of noise as they slid against each other. After letting the strings sit for half an hour, there's already moderate denting at the intersections.

I have a court tomorrow at 5:30 p.m. and will test it then.
 

Injured Again

Hall of Fame
I'm on android so don't have access to the good version of racquet tune, but last night after stringing, the ping frequency of the RPM Power was, by ear, identical to that of a previously strung S7T that has about four hours of play in it. This morning the ping frequency is noticeably lower with the RPM Power.

I doubt the light prestretch did anything more than take out some of the coil memory so for those of you who have yet to install it, maybe consider going a couple to a few pounds higher.
 

Injured Again

Hall of Fame
Got a good 90 minute hard practice session in. The short and sweet: It plays like an average round poly.

RPM Power has a bit more than average power on shots where the swing path is primarily straight through the ball. I could not get the strings to grip the ball when I tried to swing significantly upward or downward at the ball, and in those instances the ball speed was greatly reduced and the launch angle became very low even though I hit the sweet spot. Some skimming type shots that with S7T would clear the net by six feet and land near the baseline, would clear the net by just a couple of feet and land at the service "T". It is that much of a difference. It takes a concerted effort to both swing upward and forward through the ball and once I got the hang of that, I was able to get more net clearance and decent topspin.

On regular groundstrokes, my son said it appeared I had about 30% less topspin in general, and I never once was able to hit a ball which kicked up hard and high at him to cause him trouble. Underspin backhands were hard to get deep - the ones I hit were floaty and slow. After the first ten minutes when the balls got a bit fluffy, it felt like it became increasing difficult to dig the strings into the felt and get grip. Any time I didn't swing through the ball, it ended up in the net. There was also a lot of material transfer from the string to the ball, probably on the more skimming type shots where it just doesn't feel like the strings ever get a full and complete bite on the felt.



There's a little bit of give on the initial contact, and then RPM Power firms up. It's not that crisp, but is more comfortable than average both hitting the sweetspot and missing the sweetspot.

Volleys were a piece of cake. There's minimal sensitivity to incoming spin so it takes almost no adjustment when punching through topspin or underspin shots. Touch was good and it seemed easy to take speed off the ball and hit a short angle.

RPM Power makes a loud, high pitched "thwack" on contact. It actually sounds like I'm really crushing the ball even on more moderate swings. Control seems about average for a round string and better than a shaped poly. The spin insensitivity meant I could take pretty much the same swing on any incoming groundstroke and the ball would go where I aimed it.

Compared to the other round strings I've recently used, which were Kirschbaum Proline Evolution, Dunlop Xplosive Red, and Diadem Flash, RPM Power feels less crisp than Proline Evo and Flash, and seems reminiscent of what I remember of Xplosive Red. Overall, it's probably the most comfortable of these four strings. Power levels may be a little bit higher than any of the other three. Control and sensitivity to incoming ball spin seem about the same as these other three strings. I do remember having a difficult time with any of the round strings when transitioning from a moderate topspin groundstroke to a maximum topspin groundstroke, but I don't remember having as striking of a difference in launch angle and ball speed as with the RPM Power.

There is light notching of the mains in the sweetspot area. The strings did return to position the entire time. There seems to be a bit more tension loss, but playability on flatter shots remained consistent throughout the 90 minutes.

Near the end of the practice, I pulled out my other racquet with S7T. Compared to RPM Power, S7T has more power, is more crisp, and has significantly better bite on the ball. The ball trajectory had a lot more shape with the same swingpath, and the bounce was a foot or more higher. The launch angle is quite a bit higher with S7T. I immediately regained the ability to hit high loopy heavy topspin shots, and slice shots had their previous low and penetrating trajectory.

I watched Thiem play Berretini today with these strings and at least from the TV shots I can't tell that he has lost any spin. He didn't hit many of his extreme kick serves on the ad side, but his groundstrokes seem to have the same shape and bounce as he always had. I don't have the racquet head speed, swingpath, or swing mechanics to be able to replicate the shots I can create with S7T.

I'll be playing some doubles over the next few days. In the past while testing round strings, I found they suited me playing doubles because I tried only to hit low, controlled shots with minimal spin. It will also give me a chance to see how RPM Power affects my serving ability.

Impressions for now are not favorable. I prefer the way that shaped polys play. Among the round polys I've tried, I would prefer Proline Evo and Flash over RPM Rough at this time.

More later after I get a few more hours in.
 

haqq777

Legend
Got a good 90 minute hard practice session in. The short and sweet: It plays like an average round poly.

RPM Power has a bit more than average power on shots where the swing path is primarily straight through the ball. I could not get the strings to grip the ball when I tried to swing significantly upward or downward at the ball, and in those instances the ball speed was greatly reduced and the launch angle became very low even though I hit the sweet spot. Some skimming type shots that with S7T would clear the net by six feet and land near the baseline, would clear the net by just a couple of feet and land at the service "T". It is that much of a difference. It takes a concerted effort to both swing upward and forward through the ball and once I got the hang of that, I was able to get more net clearance and decent topspin.

On regular groundstrokes, my son said it appeared I had about 30% less topspin in general, and I never once was able to hit a ball which kicked up hard and high at him to cause him trouble. Underspin backhands were hard to get deep - the ones I hit were floaty and slow. After the first ten minutes when the balls got a bit fluffy, it felt like it became increasing difficult to dig the strings into the felt and get grip. Any time I didn't swing through the ball, it ended up in the net. There was also a lot of material transfer from the string to the ball, probably on the more skimming type shots where it just doesn't feel like the strings ever get a full and complete bite on the felt.



There's a little bit of give on the initial contact, and then RPM Power firms up. It's not that crisp, but is more comfortable than average both hitting the sweetspot and missing the sweetspot.

Volleys were a piece of cake. There's minimal sensitivity to incoming spin so it takes almost no adjustment when punching through topspin or underspin shots. Touch was good and it seemed easy to take speed off the ball and hit a short angle.

RPM Power makes a loud, high pitched "thwack" on contact. It actually sounds like I'm really crushing the ball even on more moderate swings. Control seems about average for a round string and better than a shaped poly. The spin insensitivity meant I could take pretty much the same swing on any incoming groundstroke and the ball would go where I aimed it.

Compared to the other round strings I've recently used, which were Kirschbaum Proline Evolution, Dunlop Xplosive Red, and Diadem Flash, RPM Power feels less crisp than Proline Evo and Flash, and seems reminiscent of what I remember of Xplosive Red. Overall, it's probably the most comfortable of these four strings. Power levels may be a little bit higher than any of the other three. Control and sensitivity to incoming ball spin seem about the same as these other three strings. I do remember having a difficult time with any of the round strings when transitioning from a moderate topspin groundstroke to a maximum topspin groundstroke, but I don't remember having as striking of a difference in launch angle and ball speed as with the RPM Power.

There is light notching of the mains in the sweetspot area. The strings did return to position the entire time. There seems to be a bit more tension loss, but playability on flatter shots remained consistent throughout the 90 minutes.

Near the end of the practice, I pulled out my other racquet with S7T. Compared to RPM Power, S7T has more power, is more crisp, and has significantly better bite on the ball. The ball trajectory had a lot more shape with the same swingpath, and the bounce was a foot or more higher. The launch angle is quite a bit higher with S7T. I immediately regained the ability to hit high loopy heavy topspin shots, and slice shots had their previous low and penetrating trajectory.

I watched Thiem play Berretini today with these strings and at least from the TV shots I can't tell that he has lost any spin. He didn't hit many of his extreme kick serves on the ad side, but his groundstrokes seem to have the same shape and bounce as he always had. I don't have the racquet head speed, swingpath, or swing mechanics to be able to replicate the shots I can create with S7T.

I'll be playing some doubles over the next few days. In the past while testing round strings, I found they suited me playing doubles because I tried only to hit low, controlled shots with minimal spin. It will also give me a chance to see how RPM Power affects my serving ability.

Impressions for now are not favorable. I prefer the way that shaped polys play. Among the round polys I've tried, I would prefer Proline Evo and Flash over RPM Rough at this time.

More later after I get a few more hours in.
Just wanted to say great feedback! Always enjoy the in depth analysis you do for every string playtest. This one sounds like an average, run-of-the-mill round poly so far. Also interested in playability and tension maintenance feedback, once you log in enough hours off course.
 

Injured Again

Hall of Fame
Just wanted to say great feedback! Always enjoy the in depth analysis you do for every string playtest. This one sounds like an average, run-of-the-mill round poly so far. Also interested in playability and tension maintenance feedback, once you log in enough hours off course.
Thanks! Always enjoyed your insights as well and definitely follow every post of yours that I can find!
 

Jouke

Semi-Pro
@Injured Again thx for your feedback! I love reading your posts. For me it is actually good news that you dont like this string, since we seem to have opposite preferences concerning strings :D. I think I will like this string a lot. I saw it live when holding Thiems racket yesterday. Love the color! And I love round strings!
 
Got a good 90 minute hard practice session in. The short and sweet: It plays like an average round poly.

RPM Power has a bit more than average power on shots where the swing path is primarily straight through the ball. I could not get the strings to grip the ball when I tried to swing significantly upward or downward at the ball, and in those instances the ball speed was greatly reduced and the launch angle became very low even though I hit the sweet spot. Some skimming type shots that with S7T would clear the net by six feet and land near the baseline, would clear the net by just a couple of feet and land at the service "T". It is that much of a difference. It takes a concerted effort to both swing upward and forward through the ball and once I got the hang of that, I was able to get more net clearance and decent topspin.

On regular groundstrokes, my son said it appeared I had about 30% less topspin in general, and I never once was able to hit a ball which kicked up hard and high at him to cause him trouble. Underspin backhands were hard to get deep - the ones I hit were floaty and slow. After the first ten minutes when the balls got a bit fluffy, it felt like it became increasing difficult to dig the strings into the felt and get grip. Any time I didn't swing through the ball, it ended up in the net. There was also a lot of material transfer from the string to the ball, probably on the more skimming type shots where it just doesn't feel like the strings ever get a full and complete bite on the felt.



There's a little bit of give on the initial contact, and then RPM Power firms up. It's not that crisp, but is more comfortable than average both hitting the sweetspot and missing the sweetspot.

Volleys were a piece of cake. There's minimal sensitivity to incoming spin so it takes almost no adjustment when punching through topspin or underspin shots. Touch was good and it seemed easy to take speed off the ball and hit a short angle.

RPM Power makes a loud, high pitched "thwack" on contact. It actually sounds like I'm really crushing the ball even on more moderate swings. Control seems about average for a round string and better than a shaped poly. The spin insensitivity meant I could take pretty much the same swing on any incoming groundstroke and the ball would go where I aimed it.

Compared to the other round strings I've recently used, which were Kirschbaum Proline Evolution, Dunlop Xplosive Red, and Diadem Flash, RPM Power feels less crisp than Proline Evo and Flash, and seems reminiscent of what I remember of Xplosive Red. Overall, it's probably the most comfortable of these four strings. Power levels may be a little bit higher than any of the other three. Control and sensitivity to incoming ball spin seem about the same as these other three strings. I do remember having a difficult time with any of the round strings when transitioning from a moderate topspin groundstroke to a maximum topspin groundstroke, but I don't remember having as striking of a difference in launch angle and ball speed as with the RPM Power.

There is light notching of the mains in the sweetspot area. The strings did return to position the entire time. There seems to be a bit more tension loss, but playability on flatter shots remained consistent throughout the 90 minutes.

Near the end of the practice, I pulled out my other racquet with S7T. Compared to RPM Power, S7T has more power, is more crisp, and has significantly better bite on the ball. The ball trajectory had a lot more shape with the same swingpath, and the bounce was a foot or more higher. The launch angle is quite a bit higher with S7T. I immediately regained the ability to hit high loopy heavy topspin shots, and slice shots had their previous low and penetrating trajectory.

I watched Thiem play Berretini today with these strings and at least from the TV shots I can't tell that he has lost any spin. He didn't hit many of his extreme kick serves on the ad side, but his groundstrokes seem to have the same shape and bounce as he always had. I don't have the racquet head speed, swingpath, or swing mechanics to be able to replicate the shots I can create with S7T.

I'll be playing some doubles over the next few days. In the past while testing round strings, I found they suited me playing doubles because I tried only to hit low, controlled shots with minimal spin. It will also give me a chance to see how RPM Power affects my serving ability.

Impressions for now are not favorable. I prefer the way that shaped polys play. Among the round polys I've tried, I would prefer Proline Evo and Flash over RPM Rough at this time.

More later after I get a few more hours in.
To be honest, sometimes that “thwack” noise is worth putting up with an otherwise mediocre string
 

Injured Again

Hall of Fame
@Injured Again thx for your feedback! I love reading your posts. For me it is actually good news that you dont like this string, since we seem to have opposite preferences concerning strings :D. I think I will like this string a lot. I saw it live when holding Thiems racket yesterday. Love the color! And I love round strings!
I love that you and I have opposite preferences because when I read your impressions, it may give me an insight that never occured to me or make me think about some belief that I strongly held which may need to change.

But you're not the only one to say that. I've had a couple of people say to me that after watching the numerous videos I've posted, that our games may have been pretty similar but their preferences were also quite different. Now with you also saying that, and it makes me wonder if I'm an outlier. But what the heck - it would be boring if we all were alike.
 

shadow01

Semi-Pro
I strung this up tonight in my SW104. The string came in typical Babolat packaging.





Can't say at least a couple of you guys didn't warn me. I tried to carefully open the package but of course it sprung open on me, and practically **exploded**.



Sigh......

After numerous colorful words and impure thoughts, I got it untangled. I did a light prestretch to ease the significant coil memory. It was better after the prestretch and sitting out for about 30 minutes. My sample measured 39' 3". I only need about 36' to string my SW104 using one piece so I was good to go. Here's the finished string job:



I used the exact same tension as S7T that was in there just prior: 51 pounds in the center 8 mains decreasing to 39 pounds on the outer mains, and 46 pounds in the center five crosses decreasing to 32 pounds at the top and bottom cross. It weighed 2 grams more than with 17 gauge S7T.

The coating feels hard and does have a matte finish to it. Stringing the first few crosses makes the mains vibrate like fingernails on a chalkboard. Elasticity was just a little bit more than an average poly. I cut a one foot section and pulled 51 pounds and let it sit for a few minutes, then repulled tension. Tension loss was average to above average. Friction weaving the crosses was a greater than average and more than with S7T, as was friction pulling through the grommets. When I was straightening the strings after finishing, the strings take a moderate amount of effort to move, then kind of suddenly give way with a creaking kind of noise as they slid against each other. After letting the strings sit for half an hour, there's already moderate denting at the intersections.

I have a court tomorrow at 5:30 p.m. and will test it then.
Thanks for posting these pics and your review. I’ve been watching this thread because I’ve been very curious about this string.
- the color looks amazing!
- anyone notice the lab location sticker - I like how they were very James Bond using latitude/longitude coordinates :)
- that coil memory is insane - great pic
I am curious what others are going to say about this string - but from your review, I’m definitely going to try the s7t - I’ve been on the fence but hear good things about that one from others also.

one question- when you say that the material comes off the string and marks up the ball - do you see anything while stringing - like flakes or marks on the clamps or something? Or scrapes on the string from the clamps that removes the metallic brown finish?
 

Injured Again

Hall of Fame
Thanks for posting these pics and your review. I’ve been watching this thread because I’ve been very curious about this string.
- the color looks amazing!
- anyone notice the lab location sticker - I like how they were very James Bond using latitude/longitude coordinates :)
- that coil memory is insane - great pic
I am curious what others are going to say about this string - but from your review, I’m definitely going to try the s7t - I’ve been on the fence but hear good things about that one from others also.

one question- when you say that the material comes off the string and marks up the ball - do you see anything while stringing - like flakes or marks on the clamps or something? Or scrapes on the string from the clamps that removes the metallic brown finish?
It is a pretty cool looking color, but from more than about ten feet away, even in direct sunlight, it's dark enough that it wouldn't catch anyone's eye.

I think anyone that has tried Tour Bite should try S7T.

I've been stringing for a long time and I have a pretty good feel for how tight I need to clamp a string to get it to hold. And I'm not using high tensions anyway so the clamping force is pretty low. I've never seen string material come off on the clamps, or flake off from bending of the string while stringing, and it didn't do so in this case. I clean my clamp surfaces about every other month or so with alcohol and have never seen any material there.

The material transfer was from the string. Though the photo doesn't clearly show it, when looking at the ball directly it's absolutely the brownish color of the string. The material feels really hard - I can't even begin to dent it with my fingernail, and scratching at it doesn't do anything to the surface. It makes me think that when I try to hit heavier topspin, that the string never really fully engages the ball even at maximum compression, but that at that time there is enough pressure between the ball and string to transfer the material over because they are still sliding against each other. I had pretty good timing yesterday and was hitting the ball pretty hard, so the impact forces were high.

Anyhow, in looking at the string now, the matte surface has worn smooth in the sweetspot, and where the strings slide against each other. Here's a closeup pic of the sweetspot area - I displaced a cross string to show the notching in the main:



The wear on the string is most visible on the cross string. You can see an ovalized area that is worn down. The mains don't show the same kind of wear. It really looks like the ball marks may have come from the cross strings. It also looks like I've worn through the outer coating where the string is notched. You can see a shinier area in the center of the notch that is probably the internal material. And this is only after 90 minutes of hitting primarily flat balls.

I watched Thiem play Schwartzman today and never saw him hit that wicked kick serve on the ad court. Also, despite how short Diego is, it didn't look like Thiem's balls were bouncing that high. I pulled some Youtube video of him from earlier this year on hard courts and it looks like he did have a lot more spin with his previous setup. The ball looked like it dove towards the court more violently and kicked up higher. But Thiem is now hitting more through the court, with more velocity. Maybe that's what he wants - to me it sure seems like this string is more suited for that style.
 

Jouke

Semi-Pro
It is a pretty cool looking color, but from more than about ten feet away, even in direct sunlight, it's dark enough that it wouldn't catch anyone's eye.

I think anyone that has tried Tour Bite should try S7T.

I've been stringing for a long time and I have a pretty good feel for how tight I need to clamp a string to get it to hold. And I'm not using high tensions anyway so the clamping force is pretty low. I've never seen string material come off on the clamps, or flake off from bending of the string while stringing, and it didn't do so in this case. I clean my clamp surfaces about every other month or so with alcohol and have never seen any material there.

The material transfer was from the string. Though the photo doesn't clearly show it, when looking at the ball directly it's absolutely the brownish color of the string. The material feels really hard - I can't even begin to dent it with my fingernail, and scratching at it doesn't do anything to the surface. It makes me think that when I try to hit heavier topspin, that the string never really fully engages the ball even at maximum compression, but that at that time there is enough pressure between the ball and string to transfer the material over because they are still sliding against each other. I had pretty good timing yesterday and was hitting the ball pretty hard, so the impact forces were high.

Anyhow, in looking at the string now, the matte surface has worn smooth in the sweetspot, and where the strings slide against each other. Here's a closeup pic of the sweetspot area - I displaced a cross string to show the notching in the main:



The wear on the string is most visible on the cross string. You can see an ovalized area that is worn down. The mains don't show the same kind of wear. It really looks like the ball marks may have come from the cross strings. It also looks like I've worn through the outer coating where the string is notched. You can see a shinier area in the center of the notch that is probably the internal material. And this is only after 90 minutes of hitting primarily flat balls.

I watched Thiem play Schwartzman today and never saw him hit that wicked kick serve on the ad court. Also, despite how short Diego is, it didn't look like Thiem's balls were bouncing that high. I pulled some Youtube video of him from earlier this year on hard courts and it looks like he did have a lot more spin with his previous setup. The ball looked like it dove towards the court more violently and kicked up higher. But Thiem is now hitting more through the court, with more velocity. Maybe that's what he wants - to me it sure seems like this string is more suited for that style.
And my love goes out to you again for the fantastic description and pictures! Well made observations on the Thiem game!! It might even be what is winning him matches and tournaments this year!
 

Injured Again

Hall of Fame
So after I got notification that @Jouke responded to this thread, I looked again at my post and specifically that picture. In thinking about it, the only way the cross string could have worn down so much while the mains didn't show as much wear would be for the mains to more fully bite the ball but slide with the ball, causing the ball to slide across the cross string. (Wow, that's a confusing sentence...) If as I've read the coating allows the mains to slide more, supposedly enhancing snapback, then that could explain the extreme amount of wear on the crosses and the material transfer onto the ball. Only thing is that if there is this enhanced movement of the mains, it is not resulting in greater spin for me.

I also took a closer look at the notched mains. I can confirm it is worn through the outer coating that is supposed to provide the enhanced string movement. Because this string is supposed to be fairly powerful, the internal material is probably fairly elastic, and elastic poly materials haven't been durable materials in my experience (like the material used in Volkl V-Square). I expect the string to notch even more quickly at this point, and it will be interesting to see if the stringbed responds differently now that the enhanced string movement is probably gone.

I'm very curious to see what experiences others have.
 

Injured Again

Hall of Fame
I got the okay from my son to publish a couple of short, unedited videos of our practice session with RPM Power. He didn't want them seen because they are pretty ugly. I picked a couple where you can see I'm having issues with launch angle. I don't usually hit so many balls into the net or into the tape, and those that do make it over the ball really has nothing on the bounce. Net clearance is low, the balls land short, and there's so little spin that the ball just doesn't bounce up or carry forward. By flattening out the ball, I was using less wrist layback and less pronation so my racquet head speed was slower. My son was having an off day already, made worse by the fact that with RPM Power, my balls were not behaving like he was expecting. He said he mis-hit a lot of balls off the bottom of his strings, and ended up reaching forward because my shots just didn't bounce to him like they normally would. By the time of the first video, I'm already really flattening out my swingpath to compensate for the feeling that the ball is sliding off the strings with my normal strokes, but I am still having issues compensating for the low launch angle. In the second video my swing starts to get pretty awkward at times as I'm trying unsuccessfully to put some additional topspin on the ball. I could not figure out the combination of forward and upward swingpath to consistently create a trajectory like I would normally hit. Or maybe I'm incapable of creating enough forward and upward racket head speed to create that trajectory with the RPM Power.

I think I hit a couple of underspin backhands in the first video. They land short and have minimal penetration. Later on as the balls got a bit fuzzy, my underspin backhand started to really float and had even less speed. Both my son and I missed a lot, so even though it was a physically hard practice from the standpoint that we didn't rest in between shots, in hindsight we really didn't hit as many balls as we normally do. And despite that, and my flatter swingpath, the strings have already notched through the outer coating in just 90 minutes of this kind of hitting.

So for your viewing displeasure, have a chuckle at how I tried to adjust (and my son as well) to playing with RPM Power.


 
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